TSB 08-07-30-035H — Buick, Cadillac, Chevrolet, GMC, Pontiac and Saturn Service bulletin
08-07-30-035H is a service bulletin on file with NHTSA for 27 Buick, Cadillac, Chevrolet, GMC, Pontiac and Saturn models, 2005–2008 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 08-07-30-035H names
Every document filed under 08-07-30-035H
| Document ID | Filed | Type |
|---|---|---|
| 08-07-30-035H | May 16, 2024 | Service bulletin |
What 08-07-30-035H covers
Transmission & drivetrain — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 08-07-30-035H?
08-07-30-035H is a service bulletin filed with NHTSA by Buick, Cadillac, Chevrolet, GMC, Pontiac and Saturn, covering 27 Buick, Cadillac, Chevrolet, GMC, Pontiac and Saturn models across the 2005–2008 model years. NHTSA's summary reads: This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
Which vehicles does 08-07-30-035H cover?
NHTSA's file names Buick LaCrosse (2005–2006); Cadillac CTS (2005–2006); Cadillac Escalade (2005–2006); Cadillac SRX (2005–2006); Chevrolet Avalanche (2005–2006); Chevrolet Aveo (2005–2007); Chevrolet Blazer (2005–2006); Chevrolet Cobalt (2005–2006); Chevrolet Colorado (2005–2006); Chevrolet Corvette (2005–2006), and 17 more vehicles listed on this page. A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 08-07-30-035H a recall, and is the repair free?
No. 08-07-30-035H is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of 08-07-30-035H?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 08-07-30-035H, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 08-07-30-035H. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.